Sound-box for talking-machines.



No. 828,602. PATENTED AUG. 14, 1906. J. G. ENGLISH.

SOUND BOX FOR TALKING MACHINES. I

APPLICATION FILED NOV. 12, 1904.

INVENTOR coinplc to discl providc such a construction in conno l-Ii'i' .lElhlEfi', r SIiXJOR TO VICTOR A (013.1% llATllON OF NEW JERSEY.

To all whom 121x137 Be it known thatv l, 1 citizen of tho Unitcd ii the city oi Camden, Stal n of A invci ted certain now Son rid-P In machins rocord vsrtical nndnl tho typo the record-g diaphragm (9 vibrates in. parts no, rho (Lo.- phiragin being hi1 inch are confined in to responds more to' tho vihrat' the. siylnsbar tnon at rho no tho outer edge i c some. which arc of hi my and iil arc not exactly siin wonic in form more readilyroit upon the cents n the diaphragm than upon the or portions thorcol, which respond niorc readi. to tho X'KiJP iOXIEi oflsss :h'cqncncy. "ms at h ar not trns harmonic "ll'RLlSOlLinl curves are those caused my the; n urnllo action tho stylusbar, (mote inc nal cont 1 with the bottom of the sound-groove or tho sides thorw of, and tho sound rc 'iroduoed is vcryinnch inaproved if thcsc ondcsualiilc viomtions can be slirninated.

. Tho ob d:

. may be had to the following spcciiicotion and ..to the accompanying (ll'iliVlI'lL-IS, forming s.

part thereof, in. which;

Figure l is a central lo 'tudinal soctional View of a sound-box showing my improvements applied thorcto. i i L is a similar 'ioiv to Fig. l, but slinwn (ho dis. phragno. and stylus-bar sopsrrtoal from the otters Patent.

- 12, 1901-. Swim No. 232,388-

sound-box. Fig. 3 is a p "vino" tho Patented Aug. 14, 1906.

dingohragmmasing, showing the manner of pivoting tho slylus-bar thereto, part of the r being broken away and Fig. 4 is an ion of a stylus-bar separated from the; sourid-boy; parts thereof being shown in seclion.

licicrri: lg to the drawings,

the numeral 1 in- 9 is scoured to tho stylus-bar 6 in the following 1 l secured in the hole formed thereby in any suitable rnam'ier, as by brazing or soldering or by producing a driving fit. The stylusbar is then bored centrally-to receive the stylus 12, said bore passing transversely t irough the pin 11. Said pin 1.1 is then bored and the hole formed thereby screw iii-d to receive tho thumb scrcw 13.

flaccd over the projecting end of the pin or on 1 11 ono said pin headed down or riveted, so as to hold said cyc in position. eyes and 10 are then scoured to the cylin dries! portion of the sound-box casingin the usual n'iz'innor by screw 14 and 15.

The central part of the diaphragm 4 isout away form a circular opening 16, Within which is placed a conical hollow piece of metal 17, which has an annular flange 18,' carried by its larger end, said flange being scoured to the diaphragm 4 in any suitable manner, such by cement or by other means. Att shod to the apex of the cone 17 and extending intsriorl y through the same is a small connccliii site and of whicl is attached to the st lus hm i :1 any suitable manner, but in this instanco by means of the screw 20. M

lt will now be soon that I have provided dio ilzes the tubular portion of the sound-boxcsntral eye 9 of the torsion-spring 7 is The 1 rod or Wire 19, the oppol at 8, 9, and 10. Thercentral eye,

. the center of the dia hra m with a substantially unyielding rigi bo y, which causes the vibrations transmitted thereto by the stylusbar to be distributed over a greater area than would be the case when the stylus-bar is connected directly with the center of the diaphragm. This construction "not. only produces a great im rovement in the quality, softness, and mel owness of the sound produced by the diaphragm, but also a much longer connection between the end of the stylus bar and the diaphragm, whereby the stylus-baris allowed to oscillate about its fulcrum much more freely and with less tendency to cause the vibrations to be delivered to the liaphragm at an oblique angle.

By attaching the torsion-spring 7 to the stylus-bar in the manner described I have providedmeans for holding said spring much more securely and firmly in position than heretoforawhile at the same time the parts are easy torm'anufactnre and more efficient in action.

Havin ,thus described my invention, it will be o vious that certain changes may be made in form, proportion, and'arrangement of arts without dep rting from the spirit an scope of my in' en-I ion; but what I claim, and desire to proti ct 6y Letters Patent of the United States, is'- 1. In a sound-box for talking-machines, the combination with a diaphragm rovided with an opening, of a hollow conica flanged body having its flanges secured to the edge of the openingifiaid diaphragm to render the center of said diaphragm insensible to nonsinusoid'al vibrations.

2. In a sound-box for talking-machines, the combination with a'diaphragm of a stylus-bar located on one side of said diaphragm, and a rigid hollow conical body attached to the central portion of said diaphragm and having its apex in the opposite side ofsaid dia hragm, and a connection between said sty us-bar and-theapex of said conical body.

3. In a sound-b x for talking-machines,

the combination wit h a diaphragm and stylusbar located on one side of said diaphragm, of

a rigid hollow conical body having its apex on the opposite side of said dia hragm and havin a flange at its base by w iich it is attached to the diaphragm and a flexible connection between said stylus-bar and the apex of said ponical body.

1. In 41 sound-box for talking-machines, the combination:- of a stylus-bar and with a diaphragm prpyided with an opening, located on one side of said diaphragm, and a rigid 'h'ollow conical body projecting through said opening with its apex on that side of the diaphragm opposite to that on which said stylus-bar is located, and a connection passing through said hollow body attached to said stylus-bar and to said hollow body.

'5. In a sound-box for talking-machines, the combination with a diaphragm provided ,with an opening, the stylus-bar located on one side of said diaphragm, and a rigid hollow conical body pro ecting through said o eningwit-h its apex on that side of the diap agln opposite to that on which the stylus-' ar is located, said body having an annular flange which is attached to said diaphra m, and a connection passing through said hollow body, attached to said stylus-bar and to the apex to the said hollow body.

6. In a sound-box for talkingmachines, the combination with a plane diaphragm of a stylus-bar located on one side of said diaphragm, and a rigid hollow conical body at-' tached to the central portion of said diaphragm with an apex on that side of the dia hragm opposite to that on which the stylusar is located, and a flexible connection between said stylus-bar and said conical body. 7. In a sound-box for talkin -machines, the combination with the stylusar thereof, of a pivoting member having a central opening, a pin passing through said opening and the stylus-bar, the central opening for the stylus passing transversely through said pin.

8. In a sound-box for talkin -machines, the combination with the stylusar thereof,

- of a pivoting member bearing a central opening therein, a pin extending through said opening and secured in an opening in the stylus-bar, the socket in said stylus-bar for the stylus passing transversely through said pin, and a thumb-screw passing longitudinally through said pin for retaining the stylus in position.

9. In a sound-box for talking-machines, with a stylus-bar thereof, of a torsion-spring having a central eye, a pin passing through said eye and through an opening in the stylus-bar, said torsion-spring also having terminal eyes which are adapted to be secured to the sound-box casing.

10. In a sound-box for talking-machines, the combination with the stylus-bar thereof, of a torsion-spring having a central eye and terminal eyes, and a pin passing through said central eye andthroug'h an opening in the stylus-bar, said pin being headed over on said eye, the stylus-socket being arranged to pass transversely through said pin.

In witness whereof I have hereunto set my hand this 10th day of November, 1904.

JOHN C. ENGLISH.

Vtitnesses JOHN F. GRADY, I HARRY Conn KENNEDY. 

